From patchwork Thu Jan 23 11:18:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11347367 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5005C1580 for ; Thu, 23 Jan 2020 11:18:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 242DC206D4 for ; Thu, 23 Jan 2020 11:18:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="c1uwStnI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728899AbgAWLSr (ORCPT ); Thu, 23 Jan 2020 06:18:47 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:39182 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726026AbgAWLSq (ORCPT ); Thu, 23 Jan 2020 06:18:46 -0500 Received: by mail-pg1-f194.google.com with SMTP id 4so1224060pgd.6 for ; Thu, 23 Jan 2020 03:18:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=14Cy2AtRziplQARjpP+FrR2VzeYvgJNHCuR6KyfvDnc=; b=c1uwStnI3pw+CyVU02GmTzCb6/Sk3dbPOf6YRPUAkeLihhwCTvNjdH7DXdOPgI+33h miBhW0Rx5MNNHmg0hiOxZP7LE++pRraXLcRppWE0jX8+U1defSmSW6nMHCQmU6bXo97D TC9Z88VXbUl+2Hy3YP8YTtQBGbaAjjc8yvQ+h5ylyJGP8AGr5AqsGnCxZ2uoEROZVVVC mdOPtlCXbgmxAqsctTIFapJ1aLuBI1AAngLGPNSKeROfZr7p4PmqVwZWW+WQHnmSS2bW 4iOaBiAg058GXdF88KmFm2wphA7hQIa2txufi7moWKbn7TRu8Xv6K13sjjVtkcgFK6Ss O5mQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=14Cy2AtRziplQARjpP+FrR2VzeYvgJNHCuR6KyfvDnc=; b=dVqCnqS6bizloVY0mk7cjowTFpCP+xbu40hMMXITR8BgbSXhoVQerlukNU0FRcHcPT +L9POcRUpQHcIE/MPjB0WDg1w5YY+56KSwEzi5sqb+qMyDSrMuAy2gWc673hfBcLjzOq /xM0M4YxlNXhTKQiGP7am4v7x3SaCjN1bt2g7XVVqbvkPDuW4S1rkTuI63g77qHuGQH7 f4fiCbDH7FX/RJ1lB/WdSa0lGzsb9t3RQgqRoJZzJ8d9BTf4hQ4dJMaW9TWuFlSiI1bk 55wGXTjQb4A6SdR2K0Gb2DOVDM4AThICQhCleyKMboJHmQONAfj1cPgIXwCkgVaVfUDw k4DA== X-Gm-Message-State: APjAAAVmMCvXhMUw9x8ixnLwHLfOrZUKK7Vcf4ESlZXfKot2Ssm4iqeR UJGr3Fuv0CiuONAtYbD9rUPz X-Google-Smtp-Source: APXvYqyqC3eUfkfrQEUKQvNcDTgCszFR5IkBKoptYJBKRY6DV0EUkpI0hVPoIO4AJQtL2ne3pmGomw== X-Received: by 2002:a63:213:: with SMTP id 19mr3436961pgc.160.1579778325593; Thu, 23 Jan 2020 03:18:45 -0800 (PST) Received: from localhost.localdomain ([103.59.133.81]) by smtp.googlemail.com with ESMTPSA id y6sm2627559pgc.10.2020.01.23.03.18.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Jan 2020 03:18:44 -0800 (PST) From: Manivannan Sadhasivam To: gregkh@linuxfoundation.org, arnd@arndb.de Cc: smohanad@codeaurora.org, jhugo@codeaurora.org, kvalo@codeaurora.org, bjorn.andersson@linaro.org, hemantk@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam Subject: [PATCH 00/16] Add MHI bus support Date: Thu, 23 Jan 2020 16:48:20 +0530 Message-Id: <20200123111836.7414-1-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hello, This is the second attempt at adding the MHI (Modem Host Interface) bus interface to Linux kernel. MHI is a communication protocol used by the host processors to control and communicate with modems over a high speed peripheral bus or shared memory. The MHI protocol has been designed and developed by Qualcomm Innovation Center, Inc., for use in their modems. The first submission was made by Sujeev Dias of Qualcomm: https://lkml.org/lkml/2018/4/26/1159 https://lkml.org/lkml/2018/7/9/987 This series addresses most of the review comments by Greg and Arnd for the initial patchset. Furthermore, in order to ease the review process I've splitted the patches logically and dropped few of them which were not required for this initial submission. Below is the high level changelog: 1. Removed all DT related code 2. Got rid of pci specific struct members from top level mhi structs 3. Moved device specific callbacks like ul_xfer() to driver struct. It doesn’t make sense to have callbacks in device struct as suggested by Greg 4. Used priv data of `struct device` instead of own priv data in `mhi_device` as suggested by Greg. This will allow us to use dev_set{get}_drvdata() APIs in client drivers 5. Removed all debugfs related code 6. Changes to the APIs to look uniform 7. Converted the documentation to .rst and placed in its own subdirectory 8. Changes to the MHI device naming 9. Converted all uppercase variable names to appropriate lowercase ones 10. Removed custom debug code and used the dev_* ones where applicable 11. Dropped timesync, DTR, UCI, and Qcom controller related codes 12. Added QRTR client driver patch 13. Added modalias support for the MHI stack as well as client driver for autoloading of modules (client drivers) by udev once the MHI devices are created This series includes the MHI stack as well as the QRTR client driver which falls under the networking subsystem. Following developers deserve explicit acknowledgements for their contributions to the MHI code: Sujeev Dias Siddartha Mohanadoss Hemant Kumar Jeff Hugo Thanks, Mani Manivannan Sadhasivam (16): docs: Add documentation for MHI bus bus: mhi: core: Add support for registering MHI controllers bus: mhi: core: Add support for registering MHI client drivers bus: mhi: core: Add support for creating and destroying MHI devices bus: mhi: core: Add support for ringing channel/event ring doorbells bus: mhi: core: Add support for PM state transitions bus: mhi: core: Add support for basic PM operations bus: mhi: core: Add support for downloading firmware over BHIe bus: mhi: core: Add support for downloading RDDM image during panic bus: mhi: core: Add support for processing events from client device bus: mhi: core: Add support for data transfer bus: mhi: core: Add uevent support for module autoloading MAINTAINERS: Add entry for MHI bus net: qrtr: Add MHI transport layer net: qrtr: Do not depend on ARCH_QCOM soc: qcom: Do not depend on ARCH_QCOM for QMI helpers Documentation/index.rst | 1 + Documentation/mhi/index.rst | 18 + Documentation/mhi/mhi.rst | 218 ++++ Documentation/mhi/topology.rst | 60 ++ MAINTAINERS | 9 + drivers/bus/Kconfig | 1 + drivers/bus/Makefile | 3 + drivers/bus/mhi/Kconfig | 14 + drivers/bus/mhi/Makefile | 2 + drivers/bus/mhi/core/Makefile | 3 + drivers/bus/mhi/core/boot.c | 510 ++++++++++ drivers/bus/mhi/core/init.c | 1283 +++++++++++++++++++++++ drivers/bus/mhi/core/internal.h | 703 +++++++++++++ drivers/bus/mhi/core/main.c | 1581 +++++++++++++++++++++++++++++ drivers/bus/mhi/core/pm.c | 974 ++++++++++++++++++ drivers/soc/qcom/Kconfig | 1 - include/linux/mhi.h | 680 +++++++++++++ include/linux/mod_devicetable.h | 13 + net/qrtr/Kconfig | 8 +- net/qrtr/Makefile | 2 + net/qrtr/mhi.c | 207 ++++ scripts/mod/devicetable-offsets.c | 3 + scripts/mod/file2alias.c | 10 + 23 files changed, 6302 insertions(+), 2 deletions(-) create mode 100644 Documentation/mhi/index.rst create mode 100644 Documentation/mhi/mhi.rst create mode 100644 Documentation/mhi/topology.rst create mode 100644 drivers/bus/mhi/Kconfig create mode 100644 drivers/bus/mhi/Makefile create mode 100644 drivers/bus/mhi/core/Makefile create mode 100644 drivers/bus/mhi/core/boot.c create mode 100644 drivers/bus/mhi/core/init.c create mode 100644 drivers/bus/mhi/core/internal.h create mode 100644 drivers/bus/mhi/core/main.c create mode 100644 drivers/bus/mhi/core/pm.c create mode 100644 include/linux/mhi.h create mode 100644 net/qrtr/mhi.c